The use of double quote marks in a character's dialogue description is usually to indicate a quote or repeated word or phrase in the dialogue. When a conversation was quoted, double quote marks were usually used to indicate the specific content of the conversation, such as what a certain character said, the occurrence of a certain event, the development of a certain plot, etc. This kind of quote usually appeared in novels, movies, animations, and other literary works to highlight the importance of the dialogue or express the authenticity of the dialogue. When repeating a conversation, double quote marks are used to indicate repeated words or phrases in the conversation. This usage was usually used when there were multiple characters in a conversation to express the dialogue relationship between different characters or character settings. For example, in a novel or movie, a character would say " I'll talk " and another character would respond with " you continue." This kind of dialogue description could help readers better understand the relationship between different characters. The usage of double quote marks in the description of characters 'dialogue should be chosen and used according to the specific literary style and plot to better express the importance and literary effect of the dialogue.